The Chiller Diller Movie Theater - S2-E4
Plot hole: Given Jim Moss, the studio chief, is already on the train, it makes no sense for him to have been in the coffin. That and how he managed to slip into it without being seen by the conductor or anyone else.
The Ozark Witch Switch - S2-E6
Plot hole: It's never explained how any of the Hatfields could've left a pile of sawdust at their cabin.